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English definition of “expand”

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expand

verb [I or T] uk   /ɪkˈspænd/ us  
B2 to increase in size, number, or importance, or to make something increase in this way: The air in the balloon expands when heated. They expanded their retail operations during the 1980s.
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(Definition of expand from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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